Hello!The thread of the steering head ballrace extractor is 1+1/2 24TPI CEI,
Whay does CEI means?

Cycle Engineers Institute.

email (option): dannydefazio@sumpmagazine.com

Oks!

Also known as BSC or BSCY....'British Standard Cycle'...Ian

email (option): julie@wright52.plus.com

It's 60 degrees included angle. Just like American standard threads.

Do not confuse with Whitworth forms which are 55 degree included angle.

email (option): britool51@hotmail.com

When you remove worn bearings, just weld a piece of metal in the ball race and remove it with a met rod and hammer. But if you want to re-use them this is not an option.

Henk.

email (option): ahum@quicknet.nl

I want to remove bearings from one frame and fit in the other, so welding a plate is not the solution.
Today I ordered to make a pieze of steel with the same thead to extract it. Tomorrow I will try to change the ballraces.

i knocked mine out with a brass drift they didnt seem that tight in the frame

email (option): roger.back@node6.com

This morning I removed the ballraces with the extractor. The surfaces of the frame and bearing was a little rusty so I had afraid to broke it;it was not very tight in the frame.